Electromagnetic relay device



A. M. HAUBRICH. ELECTROMAGNETIC RELAY DEVICE. APPLICATION FILED JULY28, I919.

1,432,691.v Patented Oct. 17,'-1922 com BATT 39 INVENTOR ALEXANDER m. HAUBR! CH BY A.

ATTORNEY Patented Oct. 17, 1922.

UNITED STATES PATENT OFFICE.

ALEXANDER M. EAUBRICH, OF CHICAGO, ILLINOIS, ASSIGNOB TO THE STROMBERG- CARLSON TELEPHONE MANUFACTURING COMPANY, OF ROCHESTER, NEW YORK, A

CORPORATION OF NEW YORK.

ELECTROMAGNETIC RELAY DEVICE.

Application filed July 28,

To all whom it may concern:

Be it known that I, ALEXANDER M. HAU- BRICH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Electromagnetic Relay Devices (Case 48), of which the following is a full, clear, concise, and exact description.

This invention relates to improvements in electromagnetic devices, and more particularly to electromagnetic devices of the inter-locking type.

The purpose of this invention is to provide an inter-lockin electromagnetic device for use in convertib e switchboards, that is, a switchboard that is readily converted from magneto operation to central energy operation. Although the present invention is primarily adapted for the purpose above outlined, it will be understood that it may be employed in other arrangments wherein inter-locking relays or electromagnets are employed.

In the drawings, Fig. 1 is a top view of the improved relay of this invention.

Fig. 2 is an end view, and Fig. 3 is a side view of the relay.

Fig. 4 represents diagrammatically portions of a telephone system wherein the present relay is employed.

Referring to the drawings, the numerals 1 and 2 designate electromagnets disposed in a arallel arrangement. Extending longitudlnally of the electromagnets and immediately above them, are metal frame plates 3 and 4 which are bent at right angles at one end to form downwardly projecting arms, as indicated at 5. These arms abut against the ends of the electromagnets and are securely clamped to them by threaded bolts, such as 8 and nuts (not shown). The electromagnets and frame plates when thus assembled are secured to mounting plate 7. This mounting plate 7 is perforated in several places to provide outlets for the terminals 9 of the coils of the electromagnets. At the extreme end of the plates 3 and 4 and extending at right angles to the longitudinal axis of these plates, are the pins 10 and 11 which serve as axis for the angular armatures l2 and 13. These armatures are locked against removal from the plates 3 and 4, by screws 14. The armature 13 is 1919. Serial No. 313,754.

provided with a vertical upright 15 provided with a notch arranged to be engaged by a spring 16. The spring 16 as well as the varlous other springs of the spring assembly, are separated by strips of insulation and fixed to the plate 4 by means of screws. The armature 12 is provided with an upstanding Z-shaped member having a latterally ex tending arm 17 so positioned that when the armature 12 is actuated, arm 17 will raise the spring 16. The armature 12 also controls several pairs of circuit controlling springs of the well known structure and arrangement which are secured to plate 3.

The operation of the relay is briefly described as follows: The electromagnet 2 is energized to attract its armature 13, whereupon the spring 16 engages the notch in the upright 15, so that the armature 13 is mechanically held in an attracted position. The armature 13 remains in its locked position until the electromagnet 1 attracts its armature 12, whereupon the arm 17 disengages the spring 16 from the notch of the upright 15, and the armature 13 assumes its normal position.

Fig. 4 of the drawings illustrate how the interlocking relay of the present invention may be used as a drop relay in a convertible switchboard, that is, a switchboard to be readily converted from magneto operation to central energy operation. In Fig. 4, there are shown two subscribers lines A and B, the first arranged for magneto operation and the second for central energy operation. When the interlocking relay is used with a subscribers line, similar to A, its electro magnet 1 is provided with two windings arranged to be included in series, but when this electromagnet is employed with a sub scribers line provided with common battery, such as B, it need only be a single wound relay.

In order to more fully bring out the method of operation of the drop relay under consideration, the method of initiating calls on two types of lines terminating at a convertible switchboard, will be described. When the subscriber at the local substation desires to initiate a call, he operates his magneto generator 25 in a well known manner and completes a circuit through contacts 2.6, conductor 27, lower armature and back contact of the electromagnet 1, winding of electromagnet 2, upper armature and back contact of electromagnet 1, conductor 28, SWltClOllOOlI and its contact 29, back to the magneto generator The electromagnet 2 is energized'in this circuit and the spring 16 (Fig. engages the upright member 15 to hold amiature 13 of this electromagnet attracted... When the electromagnet 2 operates, a signal, such as lamp functions to inform the operator that a call is awaiting attention. The operator then inserts plug P into jack J of the calling line. This closes a circuit it'rom ground, through both windings in series of electromagnetl, sleeve of the jack J, sleeve oi? the plug P, Winding of marginal relay 31, Winding of rel'ay32, to ground. Electromagnet 1 and relay 32 are energized in this circuit, but the relay 31 is not operated in series with bothivindings o1": the electromagnet 1. The conductors arranged for magneto operation are thus connected through the back contacts and armatures of relay 31 to the plug P. A supervisory conductor 34- is also extended to the supervisory circuits for magneto operation. The completion oi the call and the supervision oi the same may be of any well known type and operation, and is therefore not described.

It will now be assumed that the subscriber at Whose sul station is arranged for common battery operation, initiates a call by removing his receiver from its switchhoolt. This completes a circuit for elec'troma gnet 2, iv iich o Jerates a line relay from grounded battery, Winding of this electromagjnet, up per baclrcontact and armature oil electroma net l, conductor through the switchhoolr and its upper contact, through the receiver andtransmitter in series at substation B, conductor 36, and lower armature and back contact of eleotromagnet 1'. The electromagnet 2 attracts its armatulre and closes an operating circuit for the line lamp -37. The operator on noting that lamp 37 is lighted, inserts the answering plug; P in the jack J of the calling line. It will be noted in the present case that the "electroinagnet 1 tvhich operates as cut-olfi' relay has only one of its Windin s'afiected, As soon as the answering pl is inserted in the calling jack, a circuitis closed from grozmr ed battery, windings of relays 31 and S2 in series, sleere oi? the plug P, sleeve of the jack J conductor 3S,'upper Winding relay, it Will be understood that it may be employed in any arrangement Where interlocking relays are necessary.

What I claim is z 1. In a relay, a pair of electromagnets,

an angle armature and a spring assembly for;

each of said electromagnets, a latch mounted on the'spring assembly of one of said electromagnets and functioningunder certain conditions to holdthe armature of said electroinagn'et locked, and means actuated by the armature of the other electromagnet for disenga 'ing said latch.

2.311 a relay, a pair of el'ectroinagncts mounted in the same plane, a pair oi? angle arniatures' for each of said electromagnets, a spring assembly located above each electroina'gnet, an extension attached to the ar mature of: one electromagnet, a latchsecured to the spring assembly of said last mentioned electroniagnet and co-operating Withxsaid.

extension to lock its armature operated, and angular means carried by the other armature to disengage said latch.

8. In a relay,la pair of electromagnets mounted in the same plane, pair of angle armatures for each or said electromagnets, a sprii'ig assembly mounted above each electromagnet to be actuated by its respective arniature, a vertical extension attached to the armature of one electromagnea a latch secured to the spring assei'rrbl'y of said last mentioned electroinagnet and cooperating with said extension to look its armature operated, said latch extending in the same direction as said spring assembly, and angu lair means carried by the other armature to disengage said latch.

In Witness whereof, I hereunto subscribe my name this 24th day of July A. D. 1919.

ALEXAND'EE M. HAUBRICH. 

